Lock



Dec. 30, 1930. s. P. GOLDBERG LOCK v Filed Oct. 4, 19 29 2 Sheets-Sheet 1 flwENToR 3 5402216! 1? 60/c/bery 2a arfi ZfiJTORNEY S. P. GOLDBERG LOCK Filed Oct. 4, 1929 2 Sheets-Sheet 2 ll lvf h IN\:IENTOR Samuel 'a/dbe ATTORNEY r st-canted Dee. 30, 13tl was:

"; a w. o es SAMUEL P. GOLDBERG, G1 BROOKLYN, NEW YORK, ASSIGlTOR TO CHANTRELL LOCK CORR, A CORPORATION OF NEW YORK LOCK Application filed. Gctober 4, 1929. Serial No. 39?,235.

The pr sent invention relates to looks and is more particularly directed toward locks of a type especially adapted for use in the doors of hotel rooms. I

The present invention contemplates a look of this nature having a split, or two part, dead bolt, either or both or which may function to securely lock the door. These dead bolt parts are provided in adidti on to the n usual latch bolt and roll back mechanism.

' Both parts of the deadbolt may be actuated by key operated cylinder from the outside of the door, while but one dead bolt part may be operated both ways by the guest by means of a thumb turn on the inside of the door. T o insure strict privacy this part of the dead bolt cannot be retracted by a guest hey, master key, or by the maids key. The only way it can be retracted from the outside is by an emergency key which may be kept under the control of the hotel management. This makes it impossible for any unwarranted intrusion and, at the same time, permits the hotel management to enter the room in an emergency. The lock is also arranged so both dead bolt parts may be retracted by thumb turn. L

1 key operable mechanism whereby the latch bolt may be retrac ed by the key ai both dead bolts have been protracted, and, in order the proper sequence of operation may be had, the dead boltpart operable by the emergency key or thumb turn acts on the latch bolt retracting mechanism, so that it is out of range of the key operable mechanism while this dead bolt partis protracted.

,The foregoing arrangements may be employed in a lock constructed with the ordinary inahually aperable lever arrangement for locking the roll back to hold the latch bolt, or in a lock wherein the outer knob is rigid at all times. According to the preferred form of construction, however, an interlocking; means'is provided whereby the outside knob may be made rigid when the guest-has operated the thumb turn to protract the corresponding half of the dead bolt. This gives the added protection of a locked latch bolt and provides a signal to the housekeeper or maid e latcn bolt is preferably associated with.

to show that the room is occupied and privacy is desired.

A further object of the present invention is to provide a lock of the type having a divided dead bolt, operable in the maner above re ferred to, and with the parts so arranged that the two dead bolts and their operating mech anism occupy no more rom than ordinarily required by a gle dead bolt.

0t er and further objects of the invention will be apparent as the description proceeds.

in the accon'ipanying drawings is shown, for purposes of illustrating the present invention, one of the many posible embodiments (a right handed lock) in which the invention may take form together with the changes for a left handed lock, it being understood that the drawings are illustrative the invention rather than limiting the same.

in these drawings:

Figure 1 is a perspective view of a right handed cylinder look looking at the lock from the side carrying the cylinder;

Figure 2 is side elevational view of the lock, with cover plate removed, and showing in full lines the dad bolt, latch bolt. and all operating parts in the retracted position, the tumblers for the head bolt parts, and the key operable latch bolt retracting mechanism being shown in not and dash lines in the position to which they may be moved by the key;

Figure 3 is a ve tical sectional view on the line 3-3 of Fi jure L 5 tion or" the arrows;

Figure l is a side elevatioual view of the upper part of the lock mecl'ianism showing both dead bolt parts protracted, the position of the tumblers and thumb turn for retracting the dead bolts by the thumb turn bein indicated in dot and dash lines;

Figure 5 is side elevational view of the lock with one dead bolt part bi ken away and showing the other dead bolt part protracted by the thumb turn. and the roll back locking mechanism in looking pos tion under the control of the thun b turn;

Figure 6 is an elevational view taken in the direction of the arrow 6 of Figure 1,

a right handed lock the cylinder is threaded showing the dead bolt parts for a right handed lock, a fragment of tie cylinder and cams being shown in dot and dash lines;

Figure 7 is a view similar to Figure 6, showing the dead bolt parts for a left handed lock; and

Figures 8 and 9 are side elevational views of the bolt parts for a left handed loclr.

The face plate of the lock is indicated at 10. It carries a metal case 11 fastened in place by means of the usual screws 12, fastended through lugs in the casing and face plate. The casing has a side wa l 11a, top and bottom walls ll?) and lie, and a rear wall 11d, and is closed by a cover plate 14-. fastcnded in place by screws enterin threaded holes indicated at 15. The casing and cover plate carry posts, bosses, guides, stops, and the like for cooperation with the movable loch parts. The lock adapted to be mounted in the door in the usual manner and to cooperate with the usual striker plate, not shown. 3

The cover and easing are provided with aligned threaded holes indicated at 16 and 1?, adapted to receive the cylinder 13. For

into the cover as shown in l'figures l and 3, and is secured in place in t e usual manner by a screw indicated at 19. For a left handed lock the cylinder secured in the casing and locked in place by a screw )2 ssing through the hole 19.

The present cylinder of the double sleeve type and carries two operating cams 20 and 21.v For convenience of illustration of a right handed lock, the cylinder is omitted from Figures 2, eland 5, the cams only bein shown. This cylinder is so designed that the room key, master key, or grand master key may operate both sleeves and turn both cams. The cam 21, more remote from the end of the cylinder, is arranged to be operated by the inner sleeve, and this sleeve is arranged for operation by the emergency key which cannot operate the outer sleeve for the inner cam.

The dead bolt parts and are arranged below the cylinder. The upper dead bolt part 22 passes through the upper portion of the dead bolt opening 2% in the face plate, and the lower deadbolt 23 passes through the lower portion of this opening. The projecting portions of these dead bolt parts are wide, as will be apparent from Figure 1, and are adapted to occupy the full width of the opening in the face plate and striker plate.

In a right handed lock the inner portion 25 of the upper dead bolt 22 appears in front of the inner portion 26 of the lower dead bolt part. These dead bolt parts are guided in the opening in the face plate and by a fence or gate 27 which passes through slots 28 and 29 in the dead bolt parts.

The dead bolt 22 carries a tumbler 30, pivoted about a stump 31. The tumbler 30 has astop lug 32 coopcrable with the fence 2?. It also has an inwardly extending cam receiving portion carried between talons 34 and 35. The tumbler is urged upwardly by a spring 36 engaging a'lug 3'? on the tumbler, and the extent of upward movement is limited by engagement of the tumbler with the overhanging part of the talon 3d, and also by the engagement of the tumbler and fence 27.

The lower dead bolt 23 carries a tumbler d0, more clearly shown in Figure 5. This tumbler is pivoted on a stump ll in the inner portion of the dead bolt 23 and has a stop lug cooperable with the fence 27 and a rearwardly extending cam engaging portion 43 carried between the talons 4A and This tumbler is urged upwardly by a spring 46, cooperating with a lug 47, carried by the dead bolt part. The tumbler 4L0 has a large opening 4 8 to receive a thumb turn as). The tumbler 40 is provided with a pin which extends forwardly, as indicated in the drawings, to enter into a leftwardly opening slot 51 in the tumbler 30. The tumbler 40 also carries a short forwardly extending pin 52.

The thumb turn 49 is pivoted in the back wall 11a. of the casing and in the cover plate 14 in the usual manner. This thumb turn is bifurcated, as indicated in the drawings at 53 and 54, these bifurcations being on opposite sides of the pin 52 on the tumbler for the lower dead bolt part 23.

"When the guest key or the master key is employed, both cylinder parts will be operated and both cams, 20 and 21, will be turned simultaneously. lVhen the dead bolt parts are in retracted position, as in Figure 2 the stop lugs 32 and 42 will be on the right hand side of the fence 27, an d both tumblers will be urged upwardly by the springs. lVhen the key has operated the cylinder sufliciently to bring the cams 20 and 21 into engagement with the cam receiving portions 33 and 43 of the tumblers, these tumblers will then be moved from the full line position of Figure 2 to the dot and dash line position. This movement will release the stop lugs 32 and 42 from the fence 27 and will permit the cams to act on both bolt parts, moving them to the protracted position shown in Figure 4. The cams will then pass by the talons 34 and 44 in the usual manner, and the door will be locked by both dead bolt parts. It can be unlocked by reverse movement of the key which will release both tumblers and retract both dead bolt parts.

During the protraction of the dead bolt parts by the hey, the thumb turn l9 will be moved from the full line position of Figure 2 to the full line position of Figure 4. Should one desire to unlock the door from the inside, the thumb piece 49 will be operated in the messes customary manner. vThe turning of this thumb turn will cause the bifurcation .53 to engage with the pin 52 on the tumbler 40. This will depress the tumbler to the dot and dash position shown in Figure 4 so as to release the stop lug on this tumbler from the fence 27. During this movement the pin 50, carried by the tumbler 40, will act on the lower side of the slot 51 of the tumbler 30, and will move this tumbler to the dot and dash line position of Figure 4, thereby releasing it from the fence. Further movement of the thumb turn in a counter clockwise direction will move the two dead bolt'parts toward retracted position, this movement being brought about by the cross connection between the two tumblers. It will thus be possible for the guest to unlock the door from the inside, even though it has been locked from the outside.

hen the guest desires to lock the door from the inside, the thumb turn is turned in a clockwise direction. This will bring the right hand bifurcation 54 into engagement with the pin 52, will depress the tumbler 40 so as to release the stop lug 42 from the fence 27, and further movement of the thumb turn will protract the dead bolt part 23. There is suflicient lost motion between the pin and tumbler so that the pin does not move the tumbler 3O sulhciently to release the upper dead bolt part, and, hence, the dead bolt part 22 is left in retracted position.

When the lower dead bolt part 23 has been protracted by the thumb turn it will be in the position shown in Figure 5. Should one: now attempt to use the guest key or the master key from the outside, both sleeves of the cylinderand both cams will be turned until the cam 20, adjacent the cylinder body, engages with the upper face of the retracted upper dead bolt 22. This will arrest the cylinder and prevent further movement by the key. Hence, it will be impossible for the master or guest key to function to unlock the door.

When, however, one employs the emergency key, which can be kept under the control of the hotel management, one turns only the cam 21, and this cam will pass by the talon at, will engage the cam receiving portion 43 of the tumbler 40, so it can depress the tumbler and retract the dead bolt part.

Figures 2, 3 and 5 show latch bolt mecha nism together with means whereby the roll back for the latch bolt mechanism may be locked when the dead bOlb part 23 is locked by the thumb turn. referring to Figure 3; it will be seen that the thumb turn, 49 is provided with an arm 60, disposed behind the tumbler 40. This arm may be shapedthesame as the bifurcation 54. Underneath the thumb turn the casing is provided withsuitable guides 61 and 62 for alongitudlnally reciprocable slider 63 provided withtwo spaced shoulders 65 and 66. Theseshoulders are in.

the range of movement of the arm 60 of the thumb turn. hen the dead bolt parts are protracted or retracted by the guest or room key, the thumb turn is moved back and forth between the full line positions of Figure 2 and Figure 4, and the slider 60 remains in the same position. When, however, one protracts the lower dead bolt part 23 by the thumb turn, the arm 60 moves from the position of the arm of Figure 2' (which overlies it) to the position shown in Figure 5. This causes the arm 60 to en age ith the stop shoulder 65 and moves the slider 63 lef wardly to the position indicated.

The left end of the slider 63 is connected to a lever 67, pivoted at 68, and connected at its lower end with a locking member The locking member is guided back and forth by the posts and a guide 71. It is notched, as indicated at 72 and 73, to receive a spring 74. When the locking member 69 is in the position shown in Figure'2, it is out of engagement with a roll back 75, and, while is in the position of Figure 5, it enters the slot 76 in this roll back. This roll back may be connected to the outside knobof the door in the usual manner. The inside knob of the door is connected to a roll back 77, and the.

roll backs and 77 are associated with the usual yoke or knob shoe 78. Thisyoke open ates to retract the latch bolt 7 9 in the ordinary manner.

When both lead bolt parts 22 and 23 are in retracted position, the outside knob will be loose and one can open the door by means of this knob. l/Vhen both dead bolt parts are protracted by the key, the movement of the thumb turn is insufficient to actuate the roll back locking mechanism and, hence, the out side knob will remain loose. When, however, the lower dead bolt part is protracted'by the thumb turn, the mechanism operated by the arm 60 of the thumb turn operates to lock the outside knob shaft, and, hence, one may receive an indication from the outside of-the door that the guest has locked the door from the inside by the thumb turn.

When the en'iergency key is employed to openthe door, it retracts the dead bolt part 23 and, in doing so, will move the thumb turn from the full line position of Figure 5 back to the position of Figure This will cause the arm 60 to engage with the abutment 66 on the slider 63 and will shift the slider to the right, disengaging the roll back locking mechanism. Relocking the lower dead bolt part by the emergency key will not operate the roll back locking mecl'ianism, but will still make it possible to lock the room against in-' trusion and keep it under the control of the hotel management. 7

From the foregoing it will be seenthatthe guest can control the locking and unlockingof the door under all circumstances. except when the emergency key lS'G-HlPlOE'Qfh When is behind the inner portion 26 Inasmuch as the present type of lock en1-' ploys a two part dead bolt. it is preferable to provide it with amodified form of key operable latch bolt retracting mechanism. As shown in Figures 2, 3, 5, and 6, the inner portion 26 of the lower dead bolt part 23 is provided with an upwardly and forw: rdly extending lug 80. This lug will move back and forth in accordance with the motion of the lower dead bolt part. It is engageable with a lever 81, pivoted at 82 and cooper-able with a lever 83, pivoted at 84. The lower end of the lever 83 is engageable with the latch bolt 79.

Vhen both (lead bolt parts are protracted, or when the lower dead bolt part only is protracted, the lug 80 will engage with the lever 81 to move it to the position shown in Figures 4 and 5. It is then out of the range of movement of the key operable cams, and the cams may then be swung counter clockwise to retract the dead bolt. This will permit the spring 85 to swing the lever 80 to the full line position of Figure :2 where it will be in the path of the key operated cams, after the bolts have been retracted. The cam may then engage the lever 81, which will act on the lever 83 in the usual well known manner to retract the latch bolt. This lever 81 is so designed that it will be engaged by the cam 21, operated by the emergency key.

Figures 7 8 and 9 show the dead bolt parts for a left handed lock. In Figure '7, the dot and dash lines indicate the position of the operating cams. The cylinder may be the same as described before. The dead bolt parts are generally like the corresponding parts of the right handed lock, and are designated by corresponding reference characters with a prime added. The principal difference between the dead bolt parts for the left and right handed locks is that, in the right handed lock, the inner portion of the upper dead bolt part 22 is in front of the inner portion 2-6 of the lower dead bolt part 23, while in the left handed lock, the inner portion 25 of the upper dead bolt part of the lower dead bolt part 23. The tumblers and are substantially the same. The pins and 52' extend rearwardly instead of forwardly. In this left handed type of lock the cylinder will be threaded into the opening 17 of the casing instead of being carried by the cover plate.

It is obvious that the invention may be embodied in many forms and constructions within the scope of the claims, and I wish it to be understood that the particular form shown is but one of the many forms. Various modifications and changes being possible, I do not otherwise limit myself in any way with respect thereto.

What is claimed is:

1. A look for use with a room key or an emergency key and having a two part dead bolt, key operable machanism having rooinkey operable means for simultaneously protracting and retracting both dead bolt parts. and a thumb turn mechanism for retracting both dead bolt parts and for protracting and retracting one dead bolt part only, the key operable mechanism including emergencykey operable means for retracting and protracting said dead bolt part, whereby it may be retracted after having been protracted by the thumb turn.

2. A lock for use with a room key or an emergency key and having a two part dead bolt, a tumbler for each dead bolt part, a

double sleeve key operable cylinder, each sleeve having a cam co-operative with one cam only, the room-key operating both cams for simultaneously protracting and retracting both dead bolt parts, and a thumb turn mechanism operable on both tumblers for retracting both dead bolt parts and on only one tumbler for protracting and retracting the corresponding dead bolt part only, the other cam being operable by the emergencykey for retracting and protracting said dead bolt part, whereby it may be retracted after having been protracted by the thumb turn.

3. A look for use with a room key or an emergency key and having a casing, a face plate, a two part dead bolt carried in the casing and projecting through the face plate, the projecting portions of the dead bolt parts being one above the other, the enclosed portions being one behind the other, each onclosed portion carrying a tumbler, a double sleeve key operable cylinder bearing cams one behind the other, each cam being engageable with a tumbler, the room-key operating both cams for simultaneously protracting and retracting both dead bolt parts, and a thumb turn mechanism for retracting both dead bolt parts and for protracting and retracting one dead bolt part only, the other cam being operable by the emergency-key for retracting and protracting said dead bolt part, whereby it may be retracted after having been protracted by the thumb turn.

4:. A look for use with a room key or an emergency key and having a two part dead bolt, key operable mechanism having roomkey operable means for simultaneously protracting and retracting both dead bolt parts,

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a thumb turn mechanism for retracting both dead bolt parts and for protracting and retracting one dead bolt part only, the key operable mechanism including emergency key operable means for retracting and protracting said dead bolt part, whereby it may be retracted after having been protracted by the thumb turn, a latch bolt, and latch bolt retracting mechanism movable into and out of the path of the key operable mechanism for the said dead bolt part in accordance with the position of said dead bolt part.

5. A lock for use with a room key or an emergency key and having a two part dead bolt, a tumbler for each dead bolt part, key operable mechanism having room-key operable means engageable with both tumblers for simultaneously protracting and retracting both dead bolt parts, and a thumb turn mechanism engageable with one tumbler for protracting and retracting one dead bolt part, a cross connection between saidtiunbler and the other tumbler for retracting the other dead bolt part, the key operable mechanism including emergency-key operable means for retracting and protracting said dead bolt part, whereby it may be retracted after having been protracted by the thumb turn.

6. A look for use with a room key or an emergency key and having a two part dead bolt, key operable mechanism having roomkey operable means for simultaneously protracting and retracting both dead bolt parts, and a thumb turn mechanism for retracting both dead bolt parts and for protracting and retracting one dead bolt part only, the key operable mech anism including emergency-key operable means for retracting and protract- .ing said dead bolt part, whereby it may be retracted after havin been protracted by the thumb turn,-the dead bolts being so shaped that the stationary dead bolt provides hear ing surfaces in two planes at right angles to one another for the emergency-key operable dead bolt "4'. A lock having a two part dead bolt, a double sleeve lock cylinder adapted to receive a room key or an emergency key, each sleeve having a tumbler operating cam for protra'cting and retracting one part of the dead bol the room key operating both cams to protract and retract both dead bolt parts, the emergency key operating one sleeve only and the'corresponding cam to retract and protract one dead bolt part only, and means operating with said dead bolt part whereby the room key becomes inefi'ective for retracting saiddead bolt part.

. '8. A lock having two part dead bolt, a

double sleeve look cylinder adapted toreceive a room key or emergency key, each sleeve'having a tumbler operating cam for protracting and retracting one part of the dead bolt, the room key operating both cams to protract and retract both dead bolt parts, the

emergency key operating one sleeve only and the corresponding cam to retract and protract one dead bolt part only, means operating with said dead bolt part whereby the room :ey becomes inefiective for retracting said dead bolt part, and athumb turn for operating said latter mentioned dead bolt part to protracted or retracted position.

9. A lock having a two part dead bolt, a double sleeve lock cylinder adapted to receive a room key or an emergency key, each sleeve having a tumbler operating cam for protract in g and retracting one partof the dead bolt, the room key operating both cams to protra ct and retract both dead bolt parts, the emergency key operating one sleeve only and the corresponding cam to retract and protract one dead bolt part only, the other dead bolt part remaining in retracted position and interfering with the corresponding cam,

whereby the room kev becomes inefieotive for actuating either dead bolt part.

10. A lock having a two part dead bolt, a double sleeve lock cylinder adapted to receive a room key or an emergency key, each sleeve having a tumbler operating cam for protracting and retracting one part of the dead bolt, the room key operating both cams to protract and retract both dead bolt parts, the emergency key operating one sleeve only and the corresponding cam to retract and protract one dead bolt part only, means operating with said dead bolt part whereby the room key becomes ineffective for retracting said dead bolt part, a thumb turn for operating said latter mentioned dead bolt part to protracted or retracted position, a latch bolt and associated roll back mechanism, and thumb turn operated means for locking the roll back mechanism when the thumb turn protracts the said dead bolt part.

11. A lock comprising a spring protracted latch bolt, roll back mechanism for retracting the same from an inside knob, an outside knob connected to roll back mechanism for retracting the latch bolt, a two part dead bolt, key operated means for simultaneously protracting and retracting both dead bolt parts and for retracting the latch bolt after retracting the dead bolt, a thumb turn for protracting and retracting one dead bolt part only, and thumb turn operable mechanism for iocking the roll back for the outside knob concurrently with the protracting of the dead bolt part thereby. a

12. A look comprising a spring protracted latch bolt, roll back mechanism for retracting the same from an inside knob, anoutside knob connected to roll. backniechanism :for retracting the latch bolt, :1 two part dead bolt, key operated means protractmg and retracting one dead bolt part only or i'or simultaneously p otracting and retracting both dead bolt parts and for retracting the latch bolt after retracting the dead bolt, a thumb turn for prot acting and retracting said dead bolt part'only, andthumlii turn operable mechanism for locking the roll back for the outside knob concurrently with the protracting of said dead bolt part thereby, said roll back locking mechanism being unaliected when said dead zbOll? part is protracted by the key operated means. i

l 13. A; lock comprising a spring protracted latch bolt, roll back IDGCIlllUlifll'l for retracting the same'from an inside knob, an outside knob connected to roll back mechanism for retract ing the latch bolt, a two part dead bolt, key operated means protracting and retracting one dead bolt part only or for simultaneously protracting and retracting both dead bolt parts and for retracting the latch bolt after retracting the dead bolt, a thumb turn for protractingand retracting said dead bolt part only,=and mechanism operable solely by the thumb turn for locking the roll back for the outside knob concurrentl with the protracting of said dead bolt part thereby, said roll back locking mechanism being released the retraction of said dead bolt partby either the thumb turn or by the key.

1+1. A look comprising a spring protracted latch bolt, roll back mechanism for retracting the same from an inside knob, an outside knob connected to roll back mechanism for retracting'the latch bolt, a two zart dead bolt,

key operated means for protractn r androtraeting one dead bolt part only or ior snnultaneously protracting and retracting both dead bolt parts and for retracting the latch bolt after retracting the dead bolt, a thumb turn for protracting and retractin said dead bolt part only, and a slider movable back and forth by the 'thnmb turn and connected to mechanism for locking the roll back for the outside knob concurrently with the protract ing of said dead bolt part by the thumb turn;

and for unlocking the roll back when said deadbolt part is retracted.

15. A look comprising a spring protracted latch bolt, roll back mechanism for retra in; the same from an inside knob, an outsice knob connected to roll back mechanism tor retracting the latch bolt, a dead bolhkey operated means for protract-ing and retracting the dead bolt and for retracting the latch bolt after retracting, the dead bolt, a thumb turn for protracting and retracting the dead bolt, and thumb tn rn operable niecluinisnn for locking the roll back for the outside knob concurrently with the protracting ofthe de-a d bolt the roll back lockin mechanism beine' I: c:

unlocked by either the thumb turn or the key.

.16. In a lock, a casing, a face plate having a dead bolt aperture, a fence carried by the casing, a two part dead bolt, and a tumbler carried by each dead bolt part and cooperative with the fence to'hold the part in protracted or: retracted position, the projectable portions of the dead bolt *parts being one above the portions being one behind casing, a two part dead bolt, a tumbler carried by each dead bolt part and cooperative with the fence to hold the part in protracted or retracted position, the projectable portions; of the dead bolt parts being one above the other, the inclosed portions being one behind the other, and a thumb turn cooperative with one tumbler to'protract and retract one dead bolt part. 7

18. In a lock, a casing, a face plate having a dead bolt aperture, a fence carried by the casing, a two part dead bolt, a tumbler carried by each dead bolt part and cooperativewith the fence to hold the part in n'otracted or rctracted position, the projectable portions of the dead bolt parts being one above the other, the inclosed portions being one behind'thc other, and athumb turn cooperative with one tumbler to protract and retract one dead bolt part, there being a cross connection between said last mei'itionod'tumbler and the other tumbler effective to withdraw the same from the fence and allow the retraction of the cor- 19. A lock having a spring protractablo latch bolt, a two partdead bolt, key operable means for protracting or retracting both dead bolt parts simultaneously or for protracting and retracting; one dead bolt part only, and a key operable latch bolt return mechanism ongageable by said dead bolt part-and held in ineffective position while said dead bolt part is protracted.

20. A look having a spring protractable latch bolt, a two part dead bolt, key operable means for )rotracting or retracting both dead bolt part-s simultaneously or for protracting; and retracting one dead bolt part only, thumb turn mechanism for protracting and retracting said dead bolt, a key operable latch bolt return mechanism engageable by said dead bolt part and held in ineffective position while said dead bolt part is protracted, a roll back for retracting the latch bolt, and roll back locking mechanism operable by the thumb turn to lock the roll back when the dead bolt part is protracted by the thumb turn.

21. In a lock, a face plate, a casing, a dead bolt part having a wideouter end adapted to be projected beyond the face plate, a thin inner guiding end within the casing and having a slot to receive a fence carried by the casing, a spring pressed tumbler carried by the dead bolt part and having a stop lug enfgageablc with opposite sides of the fence, the tumbler also ha-vinga cam receiving projection between two talons, a second dead bolt part having similarly disposedwide and narrow ends, the wide ends being one above the other and the thin ends being one behind the other, the inner end of the second dead bolt part having face plate baring a fence receiving slot and talons, and a second tumbler carried by the second dead bolt part and having a similarly arranged stop lug and cam receiving portion.

22. In a lock, a face plate, a casing, a dead bolt part having a Wide outer end adapted to be projected beyond the face plate, a thin inner guiding end. within the casing and having a slot to receive a fence carried by the casing, a spring pressed tumbler carried by the (lead bolt part and having a stop lug engageable with opposite sides of the fence, the tumbler also having a cam receiving projection eetween two talons, a second dead bolt part having similarly disposed Wide and narrow ends, the wide ends being one above the other and the thin ends being one behind the other, the inner end of the second dead bolt part having a fence receiving slot and talons, and a second tumbler carried by the second dead bolt part and having a similarly arranged stop lug and cam receiving portion, a pin carried by one of said tumblers entering a slot in the other tumbler, said pin being ineffective, when both bolt parts are protracted, to actuate said other tumbler to release its stop lug from the fence concurrently with the release of the stop lug on the pin carrying tumbler and to retract the corresponding dead bolt part.

23. A look as in claim 22, wherein the pin is ineffective to actuate the slotted tumbler to release its stop lug from the fence When the pin carrying tumbler is actuated to protract its dead bolt.

SAMUEL P. GOLDBERG. 

